1. CATLIN LAKE A case study By Kate Hilfiker

2. Location Catlin Lake is located in the Adirondacks in the Huntington Biological Field Station We visited this lake during our field trip The sun was shinning There was a large whole in one of the boats

3. Background information Oligotrophic lake –The watershed is small, protected, land has little development –Low nutrient content Small Adirondack lake 12.5 meters deep at the deepest points Dimictic Very beautiful

4. Temperature Profile Epi0-5.5m Meta5.5-7m Hypo7-12.5m

5. Unique macrophytes Common Pipewort (Eriocaulon aquaticum) -shallow fresh water -Full sun -Sandy/peaty, slightly acidic soil -Clear water Water Celery (Vallisneria americana) -Ponds, lakes, and quiet streams at depths of 1 to 4 m -Leaves, fruits, and rootstocks are excellent food for waterfowl

6. Macroinvertebrates and Benthos Phantom Midge Larva (Charborus species) -Secondary consumers -Filter Feeders -Eat Daphnia and Cyclops -Eaten by many fish Order-Trichoptera Family- Molannidae -larvae construct a shield-shaped case made of sand grains -found in lakes with sand

7. Algae!! -There is an abundance of sand present at this lake. -A good source of silica Tabellaria Asterionella Large round green algae Pleodorina Staurastrum Ceratium Pediastrum

8. Zooplankton Daphnia Calanoid Kellicotta Keratella Bosmina

9. QUESTIONS?